Since Germany uses the PAL TV standard it might not work on NTSC equipment.
as this is black&white (and there is no burst involved, PAL=4.43Mhz, NTSC=3.38Mhz) it might work on some Tv's because 50Hz * 625 lines = 31250 lines in PAL and 60Hz * 525 lines = 31500 lines so there is only difference of 250 lines/sec, it all depends on the vertical sync of the TV.
if we can get to the asm source I think it would be easy to change the 50Hz into 60Hz and the 625 lines to 525 lines.
Erik